TWI711219B - Antenna system - Google Patents

Abstract

An antenna system includes a first antenna, a second antenna, a first parasitic element, and a second parasitic element. The first antenna includes a first feeding element, a first radiation element, and a shorting element. The first radiation element is coupled to the first feeding element. The first feeding element is coupled through the shorting element to a first grounding point. The second antenna includes a second feeding element, a second radiation element, and a third radiation element. The second radiation element and the third radiation element are coupled to the second feeding element. The second radiation element and the third radiation element substantially extend in opposite directions. The first parasitic element is coupled to a second grounding point. The second parasitic element is coupled to a third grounding point. The first parasitic element and the second parasitic element are disposed between the first antenna and the second antenna. The first parasitic element and the second parasitic element substantially extend away from each other.

Description

Antenna system

The present invention relates to an antenna system (Antenna System), and particularly relates to an antenna system that can improve isolation (Isolation).

With the development of mobile communication technology, mobile devices have become more and more common in recent years, such as portable computers, mobile phones, multimedia players and other portable electronic devices with mixed functions. In order to meet people's needs, mobile devices usually have wireless communication functions. Some cover long-distance wireless communication ranges. For example, mobile phones use 2G, 3G, LTE (Long Term Evolution) systems and the 700MHz, 850 MHz, 900MHz, 1800MHz, 1900MHz, 2100MHz, 2300MHz, and 2500MHz frequency bands used for communication. Others cover short-distance wireless communication ranges, such as: Wi-Fi and Bluetooth systems use 2.4GHz, 5.2GHz and 5.8GHz frequency bands for communication.

The antenna system (Antenna System) is an indispensable component in mobile devices that support wireless communication. However, due to the small internal space of the mobile device, the configuration of the antennas is often very close, and it is easy to interfere with each other. Therefore, it is necessary to design a brand-new antenna system to improve the problem of poor isolation in the traditional antenna system.

In a preferred embodiment, the present invention provides an antenna system, including: a first antenna, including: a first feeding part having a first feeding point; a first radiating part coupled to the first A feeding portion; and a short-circuiting portion, wherein the first feeding portion is coupled to a first grounding point via the short-circuiting portion; a second antenna includes: a second feeding portion having a second feeding point; A second radiating portion coupled to the second feeding portion; and a third radiating portion coupled to the second feeding portion, wherein the second radiating portion and the third radiating portion extend substantially in opposite directions; A first parasitic part, coupled to a second ground point; and a second parasitic part, coupled to a third ground point, wherein the first parasitic part and the second parasitic part are both set on the first day Between the wire and the second antenna, and generally extend in the direction away from each other.

In some embodiments, the antenna system further includes: a non-conductor support element for supporting the first antenna, the second antenna, the first parasitic part, and the second parasitic part, wherein the non-conductor supports The element has a first surface and a second surface that are not parallel to each other.

In some embodiments, the first radiation part presents a U-shape.

In some embodiments, the first radiation portion extends from the first surface to the second surface of the non-conductor support element.

In some embodiments, the short-circuit portion has a serpentine shape.

In some embodiments, the short-circuit portion is located on the first surface of the non-conductor support element.

In some embodiments, the second radiating portion has a shorter straight bar shape.

In some embodiments, the second radiating portion is located on the first surface of the non-conductor supporting element.

In some embodiments, the third radiating portion has a long straight strip shape.

In some embodiments, the third radiating part is located on the first surface of the non-conductor supporting element.

In some embodiments, the first parasitic part has an inverted L shape.

In some embodiments, the first parasitic portion extends from the first surface to the second surface of the non-conductor support element.

In some embodiments, the second parasitic part presents an L-shape.

In some embodiments, the second parasitic portion extends from the first surface to the second surface of the non-conductor support element.

In some embodiments, the first antenna and the second antenna both cover a first frequency band between 2496 MHz and 2690 MHz, and a second frequency band between 3300 MHz and 3800 MHz.

In some embodiments, the total length of the first feeding portion and the first radiating portion is between 0.15 and 0.2 wavelengths of the first frequency band.

In some embodiments, the total length of the first feeding portion and the short-circuit portion is between 0.3 times and 0.4 times the wavelength of the second frequency band.

In some embodiments, the total length of the second feeding portion and the second radiating portion is between 0.1 times and 0.12 times the wavelength of the second frequency band.

In some embodiments, the total length of the second feeding portion and the third radiating portion is between 0.12 times and 0.14 times the wavelength of the first frequency band.

In some embodiments, the distance between the first parasitic part and the second parasitic part is between 1.1 mm and 2 mm.

In order to make the purpose, features and advantages of the present invention more comprehensible, specific embodiments of the present invention are listed below, with the accompanying drawings, and detailed descriptions are as follows.

Certain words are used in the specification and the scope of the patent application to refer to specific elements. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and the scope of patent application do not use differences in names as a way to distinguish elements, but use differences in functions of elements as a criterion. The terms "including" and "including" mentioned in the entire specification and the scope of the patent application are open-ended terms, so they should be interpreted as "including but not limited to". The term "approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and achieve the basic technical effect. In addition, the term "coupling" includes any direct and indirect electrical connection means in this specification. Therefore, if it is described in the text that a first device is coupled to a second device, it means that the first device can be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connecting means. Two devices.

The following disclosure provides many different embodiments or examples to implement different features of this case. The following disclosure describes specific examples of each component and its arrangement to simplify the description. Of course, these specific examples are not meant to be limiting. For example, if this disclosure describes that a first feature is formed on or above a second feature, it means that it may include an embodiment in which the first feature is in direct contact with the second feature, or it may include additional The feature is formed between the first feature and the second feature, and the first feature and the second feature may not be in direct contact with each other. In addition, different examples of the following disclosure may repeatedly use the same reference symbol or (and) mark. These repetitions are for the purpose of simplification and clarity, and are not used to limit the specific relationship between the different embodiments or (and) structures discussed.

FIG. 1 shows a front view of an antenna system (Antenna System) 100 according to an embodiment of the invention. FIG. 2 shows a top view of the antenna system 100 according to an embodiment of the invention. Please refer to Figures 1 and 2 together. The antenna system 100 can be applied to a mobile device, such as a smart phone (Smart Phone), a tablet computer (Tablet Computer), or a notebook computer (Notebook Computer). As shown in Figures 1 and 2, the antenna system 100 includes at least: a first antenna (Antenna) 110, a second antenna 150, a first parasitic element (Parasitic Element) 210, and a second parasitic element 220 , Wherein the first parasitic portion 210 and the second parasitic portion 220 are both disposed between the first antenna 110 and the second antenna 150. The first antenna 110, the second antenna 150, the first parasitic portion 210, and the second parasitic portion 220 can all be made of metal materials, such as copper, silver, aluminum, iron, or alloys thereof.

In some embodiments, the antenna system 100 further includes a non-conductor supporting element 230, which can be made of plastic material. The non-conductor support element 230 is used to support the first antenna 110, the second antenna 150, the first parasitic portion 210, and the second parasitic portion 220. The non-conductor support element 230 may have a first surface E1 and a second surface E2 that are not parallel to each other, so that the antenna and the parasitic part of the antenna system 100 distributed thereon may exhibit a three-dimensional structure. For example, the first surface E1 and the second surface E2 may be two planes that are adjacent to each other and perpendicular. However, the present invention is not limited to this. In other embodiments, the first surface E1 and the second surface E2 can have different included angles (for example: 30 degrees, 45 degrees, or 60 degrees), or the first surface E1 and the second surface E2 can be parallel to each other And they overlap, so that the antenna and the parasitic part of the antenna system 100 distributed thereon can present a planar structure.

The first antenna 110 has a first feeding point (Feeding Point) FP1. The first feed point FP1 can be coupled to a first signal source (Signal Source) 191, such as a radio frequency (RF) module, which can be used to excite the first antenna 110. In addition, the first antenna 110 includes a first feeding element (Feeding Element) 120, a first radiation element (Radiation Element) 130, and a shorting element (Shorting Element) 140.

The first feeding portion 120 may be substantially rectangular or linear, and it may be completely disposed on the first surface E1 of the non-conductor supporting element 230. In detail, the first feeding portion 120 has a first end 121 and a second end 122, wherein the first feeding point FP1 is located at the first end 121 of the first feeding portion 120.

The first radiating portion 130 may substantially exhibit a U-shape, which may extend from the first surface E1 of the non-conductor supporting element 230 to the second surface E2. In detail, the first radiation portion 130 has a first end 131 and a second end 132, wherein the first end 131 of the first radiation portion 130 is coupled to the second end 122 of the first feeding portion 120, and the first end The second end 132 of a radiating part 130 is an open end.

The short-circuit portion 140 may substantially exhibit a meandering shape, which may be completely disposed on the first surface E1 of the non-conductor supporting element 230. In detail, the short-circuit portion 140 has a first end 141 and a second end 142. The first end 141 of the short-circuit portion 140 is coupled to a first grounding point (Grounding Point) GP1. The two ends 142 are coupled to the second end 122 of the first feeding portion 120 so that the first feeding portion 120 can be coupled to the first ground point GP1 via the short-circuit portion 140. For example, the first ground point GP1 can be located at a first position on a ground element, and the ground element (not shown) can be used to provide a ground potential VSS.

The second antenna 150 has a second feed point FP2. The second feed point FP2 can be coupled to a second signal source 192, such as another radio frequency module, which can be used to excite the second antenna 150. In addition, the second antenna 150 includes a second feeding portion 160, a second radiating portion 170, and a third radiating portion 180.

The second feeding portion 160 may be substantially rectangular or straight, and it may be completely disposed on the first surface E1 of the non-conductor supporting element 230. In detail, the second feeding portion 160 has a first end 161 and a second end 162, wherein the second feeding point FP2 is located at the first end 161 of the second feeding portion 160.

The second radiating portion 170 may generally exhibit a shorter straight bar shape, and it may be completely disposed on the first surface E1 of the non-conductor supporting element 230. In detail, the second radiating portion 170 has a first end 171 and a second end 172, wherein the first end 171 of the second radiating portion 170 is coupled to the second end 162 of the second feeding portion 160, and the The second end 172 of the two radiation portions 170 is an open end. The second end 132 of the first radiating portion 130 and the second end 172 of the second radiating portion 170 may extend substantially in opposite directions and close to each other.

The third radiating portion 180 may substantially exhibit a long straight strip shape, and it may be completely disposed on the first surface E1 of the non-conductor supporting element 230. In detail, the third radiating portion 180 has a first end 181 and a second end 182, wherein the first end 181 of the third radiating portion 180 is coupled to the second end 162 of the second feeding portion 160, and the The second end 182 of the three radiation portion 180 is an open end. The second end 172 of the second radiating portion 170 and the second end 182 of the third radiating portion 180 may extend substantially in opposite directions and away from each other. In some embodiments, a combination of the second feeding portion 160, the second radiating portion 170, and the third radiating portion 180 substantially presents a T-shape.

The first parasitic portion 210 may substantially exhibit an inverted L shape, which may extend from the first surface E1 of the non-conductor supporting element 230 to the second surface E2. In detail, the first parasitic portion 210 has a first end 211 and a second end 212. The first end 211 of the first parasitic portion 210 is coupled to a second ground point GP2, and the first parasitic portion 210 The second end 212 is an open end. The second ground point GP2 may be located at a second position on the ground element, which may be different from the aforementioned first position. A first coupling gap (Coupling Gap) GC1 may be formed between the first parasitic portion 210 and the short-circuit portion 140.

The second parasitic portion 220 may substantially exhibit an L-shape, which may extend from the first surface E1 of the non-conductor support element 230 to the second surface E2. In detail, the second parasitic portion 220 has a first end 221 and a second end 222. The first end 221 of the second parasitic portion 220 is coupled to a third ground point GP3, and the second parasitic portion 220 The second end 222 is an open end. The third ground point GP3 may be located at a third position on the ground element, which may be different from the aforementioned first position and second position. The second end 212 of the first parasitic portion 210 and the second end 222 of the second parasitic portion 220 may extend substantially in opposite directions and away from each other. A second coupling gap GC2 may be formed between the second parasitic portion 220 and the second radiating portion 170. In some embodiments, the first parasitic portion 210 and the second parasitic portion 220 are linearly symmetrical along the center line of the antenna system 100.

Fig. 3 shows an S-Parameter (S-Parameter) diagram of the antenna system 100 according to an embodiment of the present invention, where the horizontal axis represents the operating frequency (MHz), and the vertical axis represents the S-parameter (dB). If the first feed point FP1 is set to a first port (Port 1) and the second feed point FP2 is set to a second port (Port 2), Figure 3 can show the information about the first antenna 110 One S11 parameter curve S11, one S22 parameter curve S22 of the second antenna 150, and one S21 parameter curve S21 between the first antenna 110 and the second antenna 150. According to the measurement results in Figure 3, both the first antenna 110 and the second antenna 150 can cover a first frequency band FB1 between 2496MHz and 2690MHz, and a second frequency band between 3300MHz and 3800MHz FB2. Therefore, the antenna system 100 will at least support broadband operations in the Sub-6GHz frequency band of the new generation of 5G communications (for example, the N41 and N78 frequency bands). In addition, in the aforementioned first frequency band FB1 and second frequency band FB2, the isolation between the first antenna 110 and the second antenna 150 can be maintained at least 10 dB.

Figure 4 is a diagram showing the radiation efficiency (Radiation Efficiency) of the antenna system 100 according to an embodiment of the present invention. The horizontal axis represents the operating frequency (MHz) and the vertical axis represents the radiation efficiency (dB). FIG. 4 may show a first radiation efficiency curve AE1 for the first antenna 110 and a second radiation efficiency curve AE2 for the second antenna 150. According to the measurement results in Figure 4, in the aforementioned first frequency band FB1 and second frequency band FB2, the radiation efficiency of each of the first antenna 110 and the second antenna 150 can reach at least -4dB. It can meet the actual application requirements of general mobile communications.

In some embodiments, the operating principle of the antenna system 100 may be as follows. In the first antenna 110, the first feeding portion 120 and the first radiating portion 130 can be jointly excited to generate the first frequency band FB1, and the first feeding portion 120 and the short-circuiting portion 140 can be jointly excited to generate the second frequency band FB2. In the second antenna 150, the second feeding part 160 and the second radiating part 170 can be jointly excited to generate the second frequency band FB2, and the second feeding part 160 and the third radiating part 180 can be jointly excited to generate the first frequency band FB1. According to the actual measurement results, the first parasitic portion 210 and the second parasitic portion 220 can be used to attract unnecessary resonance current (Resonant Current), which helps to strengthen the isolation between the first antenna 110 and the second antenna 150 Therefore, the first antenna 110 and the second antenna 150 are less likely to interfere with each other.

In some embodiments, the element size of the antenna system 100 may be as follows. The total length L1 of the first feeding portion 120 and the first radiating portion 130 (that is, the total length L1 from the first end 121, through the second end 122 and the first end 131, and then to the second end 132) can be adjusted Between 0.15 and 0.2 wavelengths (0.15λ～0.2λ) of the first frequency band FB1. The total length L2 of the first feeding portion 120 and the short-circuit portion 140 (that is, the total length L2 from the first end 121, through the second end 122 and the second end 142, and then to the first end 141) may be between The two-band FB2 is between 0.3 times and 0.4 times the wavelength (0.3λ～0.4λ). The total length L3 of the second feeding portion 160 and the second radiating portion 170 (that is, the total length L3 from the first end 161, through the second end 162 and the first end 171, and then to the second end 172) can be adjusted Between 0.1 times and 0.12 times the wavelength of the second frequency band FB2 (0.1λ～0.12λ). The total length L4 of the second feeding portion 160 and the third radiating portion 180 (that is, the total length L4 from the first end 161 through the second end 162 and the first end 181 to the second end 182) can be adjusted Between 0.12 times and 0.14 times the wavelength of the first frequency band FB1 (0.12λ～0.14λ). The distance D1 between the first parasitic portion 210 and the second parasitic portion 220 may be between 1.1 mm and 2 mm. The length LA of the first parasitic part 210 (that is, the length LA from the first end 211 to the second end 212) can be between 0.24 and 0.26 times the wavelength of the second frequency band FB2 (0.24λ～0.26λ ). The length LB of the second parasitic portion 220 (that is, the length LB from the first end 221 to the second end 222) may be between 0.24 and 0.26 times the wavelength of the second frequency band FB2 (0.24λ～0.26λ ). The width of the first coupling gap GC1 may be between 2.8 mm and 3.6 mm. The width of the second coupling gap GC2 may be between 2.8 mm and 3.6 mm. The above element size range is calculated based on the results of many experiments, which helps to optimize the isolation, operation bandwidth (Operation Bandwidth), and impedance matching (Impedance Matching) of the antenna system 100.

FIG. 5A is a perspective view of an antenna system 500 according to another embodiment of the invention. FIG. 5B is a perspective view (from a different perspective) of the antenna system 500 according to another embodiment of the present invention. In the embodiment shown in FIGS. 5A and 5B, the antenna system 500 is distributed on a non-conductor support element (not shown) of a three-dimensional and irregular shape to be compatible with different environmental conditions. According to actual measurement results, this configuration method can increase design flexibility, but will not negatively affect the radiation efficiency of the antenna system 500. The remaining features of the antenna system 500 in FIGS. 5A and 5B are similar to those of the antenna system 100 in FIGS. 1 and 2. Therefore, both embodiments can achieve similar operating effects.

The present invention proposes a novel antenna system. Compared with the traditional design, the present invention at least has the advantages of small size, wide frequency band, high isolation, and low manufacturing cost. Therefore, it is very suitable for various mobile communication devices. .

It should be noted that the above-mentioned component size, component shape, and frequency range are not the limiting conditions of the present invention. The antenna designer can adjust these settings according to different needs. The antenna system of the present invention is not limited to the state illustrated in Figs. 1-5. The present invention may only include any one or more of the features of any one or more of the embodiments in FIGS. 1-5. In other words, not all the illustrated features need to be implemented in the antenna system of the present invention at the same time.

The ordinal numbers in this specification and the scope of the patent application, such as "first", "second", "third", etc., do not have a sequential relationship between each other, and they are only used to distinguish two having the same Different components of the name.

Although the present invention is disclosed as above in a preferred embodiment, it is not intended to limit the scope of the present invention. Anyone who is familiar with the art can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to those defined by the attached patent scope.

100, 500: antenna system 110: first antenna 120: The first feeding part 121: The first end of the first feeding part 122: The second end of the first feeding part 130: First Radiation Department 131: The first end of the first radiating part 132: The second end of the first radiating part 140: Short circuit part 141: The first end of the short circuit 142: The second end of the short-circuit part 150: second antenna 160: The second feeding part 161: The first end of the second feeding part 162: The second end of the second feeding part 170: Second Radiation Department 171: The first end of the second radiating part 172: The second end of the second radiating part 180: Third Radiation Department 181: The first end of the third radiating part 182: The second end of the third radiation part 191: First signal source 192: Second signal source 210: The first parasitic part 211: The first end of the first parasitic part 212: The second end of the first parasitic part 220: second parasite 221: The first end of the second parasitic part 222: The second end of the second parasitic part 230: non-conductor support element AE1: The first radiation efficiency curve AE2: second radiation efficiency curve D1: Spacing E1: The first surface of the non-conductor supporting element E2: The second surface of the non-conductor supporting element FB1: First frequency band FB2: Second frequency band FP1: the first feed point FP2: second feed point GC1: first coupling gap GC2: second coupling gap GP1: first ground point GP2: second ground point GP3: third ground point L1, L2, L3, L4: total length LA, LB: length S11: S11 parameter curve S22: S22 parameter curve S21: S21 parameter curve VSS: Ground potential

Fig. 1 shows a front view of an antenna system according to an embodiment of the invention. Figure 2 is a top view of the antenna system according to an embodiment of the invention. Fig. 3 shows the S parameter diagram of the antenna system according to an embodiment of the invention. Figure 4 is a diagram showing the radiation efficiency of the antenna system according to an embodiment of the invention. FIG. 5A is a perspective view of an antenna system according to another embodiment of the invention. FIG. 5B is a perspective view of an antenna system according to another embodiment of the invention.

100: Antenna system

110: first antenna

120: The first feeding part

121: The first end of the first feeding part

122: The second end of the first feeding part

130: First Radiation Department

131: The first end of the first radiating part

140: Short circuit part

141: The first end of the short circuit

142: The second end of the short-circuit part

150: second antenna

160: The second feeding part

161: The first end of the second feeding part

162: The second end of the second feeding part

170: Second Radiation Department

171: The first end of the second radiating part

172: The second end of the second radiating part

180: Third Radiation Department

181: The first end of the third radiating part

182: The second end of the third radiation part

191: First signal source

192: Second signal source

210: The first parasitic part

211: The first end of the first parasitic part

220: second parasite

221: The first end of the second parasitic part

230: non-conductor support element

D1: Spacing

E1: The first surface of the non-conductor supporting element

FP1: the first feed point

FP2: second feed point

GP1: first ground point

GP2: second ground point

GP3: third ground point

L1, L2, L3, L4: total length

LA, LB: length

VSS: Ground potential

Claims (22)

An antenna system includes: a first antenna, including: a first feeding part having a first feeding point; a first radiating part coupled to the first feeding part; and a short-circuit part, wherein the The first feeding part is coupled to a first grounding point via the short-circuit part; a second antenna includes: a second feeding part having a second feeding point; a second radiating part coupled to the A second feeding portion; and a third radiating portion coupled to the second feeding portion, wherein the second radiating portion and the third radiating portion extend in substantially opposite directions; a first parasitic portion is coupled to a A second ground point; and a second parasitic part coupled to a third ground point, wherein the first parasitic part and the second parasitic part are both disposed between the first antenna and the second antenna, And extend substantially in the direction away from each other; wherein the first antenna and the second antenna both cover a first frequency band and a second frequency band; wherein the total length of the first feeding portion and the first radiating portion is It is between 0.15 times and 0.2 times the wavelength of the first frequency band. The antenna system described in item 1 of the scope of patent application further includes: a non-conductor supporting element for supporting the first antenna, the second antenna, the first parasitic part, and the second parasitic part, Where the non-conductor support elements have different A first surface and a second surface are parallel. According to the antenna system described in item 1 of the scope of patent application, the first radiating part is U-shaped. According to the antenna system described in claim 2, wherein the first radiating portion extends from the first surface to the second surface of the non-conductor supporting element. According to the antenna system described in claim 1, wherein the short-circuit portion is in a serpentine shape. According to the antenna system described in claim 2, wherein the short-circuit part is located on the first surface of the non-conductor support element. In the antenna system described in the first item of the scope of patent application, the second radiating part has a shorter straight shape. According to the antenna system described in claim 2, wherein the second radiating part is located on the first surface of the non-conductor supporting element. In the antenna system described in item 1 of the scope of the patent application, the third radiating portion has a long straight strip shape. According to the antenna system described in claim 2, wherein the third radiating portion is located on the first surface of the non-conductor supporting element. As for the antenna system described in claim 1, wherein the first parasitic part is in an inverted L shape. According to the antenna system described in claim 2, wherein the first parasitic portion extends from the first surface to the second surface of the non-conductor supporting element. The antenna system described in item 1 of the scope of patent application, wherein the second The parasitic part presents an L shape. According to the antenna system described in claim 2, wherein the second parasitic part extends from the first surface to the second surface of the non-conductor supporting element. As for the antenna system described in claim 1, wherein the first frequency band is between 2496MHz and 2690MHz, and the second frequency band is between 3300MHz and 3800MHz. The antenna system described in the first item of the scope of patent application, wherein the total length of the first feeding portion and the short-circuit portion is between 0.3 times and 0.4 times the wavelength of the second frequency band. The antenna system described in the first item of the scope of patent application, wherein the total length of the second feeding portion and the second radiating portion is between 0.1 times and 0.12 times the wavelength of the second frequency band. In the antenna system described in item 1 of the scope of patent application, the total length of the second feeding portion and the third radiating portion is between 0.12 times and 0.14 times the wavelength of the first frequency band. The antenna system described in the first item of the scope of patent application, wherein the distance between the first parasitic part and the second parasitic part is between 1.1mm and 2mm. An antenna system includes: a first antenna, including: a first feeding part having a first feeding point; a first radiating part coupled to the first feeding part; and a short-circuit part, wherein the The first feeding part is coupled to a first ground point via the short-circuit part; A second antenna includes: a second feeding part having a second feeding point; a second radiating part coupled to the second feeding part; and a third radiating part coupled to the second The feeding portion, wherein the second radiating portion and the third radiating portion extend in substantially opposite directions; a first parasitic portion coupled to a second ground point; and a second parasitic portion coupled to a third Grounding point, wherein the first parasitic part and the second parasitic part are both arranged between the first antenna and the second antenna, and extend substantially in directions away from each other; wherein the first antenna and the second antenna The second antennas both cover a first frequency band and a second frequency band; wherein the total length of the first feeding part and the short-circuit part is between 0.3 times and 0.4 times the wavelength of the second frequency band. An antenna system includes: a first antenna, including: a first feeding part having a first feeding point; a first radiating part coupled to the first feeding part; and a short-circuit part, wherein the The first feeding part is coupled to a first grounding point via the short-circuit part; a second antenna includes: a second feeding part having a second feeding point; a second radiating part coupled to the A second feeding portion; and a third radiating portion coupled to the second feeding portion, wherein the second radiating portion and the third radiating portion extend in substantially opposite directions; A first parasitic part, coupled to a second ground point; and a second parasitic part, coupled to a third ground point, wherein the first parasitic part and the second parasitic part are both set on the first day Between the wire and the second antenna, and generally extend in the direction away from each other; wherein the first antenna and the second antenna both cover a first frequency band and a second frequency band; wherein the second feeding part The total length with the second radiating part is between 0.1 times and 0.12 times the wavelength of the second frequency band. An antenna system includes: a first antenna, including: a first feeding part having a first feeding point; a first radiating part coupled to the first feeding part; and a short-circuit part, wherein the The first feeding part is coupled to a first grounding point via the short-circuit part; a second antenna includes: a second feeding part having a second feeding point; a second radiating part coupled to the A second feeding portion; and a third radiating portion coupled to the second feeding portion, wherein the second radiating portion and the third radiating portion extend in substantially opposite directions; a first parasitic portion is coupled to a A second ground point; and a second parasitic part coupled to a third ground point, wherein the first parasitic part and the second parasitic part are both disposed between the first antenna and the second antenna, And extend roughly in the direction away from each other; wherein the first antenna and the second antenna both cover a first frequency band and a second frequency Band; wherein the total length of the second feeding portion and the third radiating portion is between 0.12 times to 0.14 times the wavelength of the first frequency band.

Images